JPH0925719A - Mobile scaffold for caisson type pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile scaffold for a caisson type pile freely liftable or lowerable, capable of preventing shakes in the longitudinal direction or the right and left directions, and capable of changing the diameter as required. SOLUTION: This scaffold is liftably suspended by a lifting means via long members 3 extended downward from a frame 1 assembled above a caisson type pile hole H. Multiple sway rods 12,... are radially and reciprocatably provided on the outer periphery section of a scaffold main body 11, and sensors detecting the protruded state or the retreated state of the rods 12 are provided on the rods 12. A scaffold diameter adjusting means 13 capable of changing the diameter of the scaffold main body 11 itself is provided on the scaffold main body 11. The scaffold diameter adjusting means 13 can switch multiple rods 12 provided at intervals in the peripheral direction on the outer periphery of the scaffold main body 11 to the erected state or the prostrated state. When the rods 12 are switched to the prostrated horizontal state, a plate material is mounted on them.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a relocation scaffold for deep foundations.

[0002]

2. Description of the Related Art One of the methods for forming columnar piles is the deep foundation method. This deep foundation construction method uses a corrugated iron plate and a ring made of chevron steel, etc. to stop the mountain while excavating a hole manually, and after reaching the supporting ground, assembles the reinforcing bars and removes the cleat material. It is a method of placing concrete to make piles. Usually, excavation is performed with two or three workers in the hole, and when the ground is soft, a scoop is used, and when the ground is hard, a rock drill or the like is used. Further, the excavated earth and sand is carried out of the hole by winding a small bucket attached to a rack assembled above the deep foundation hole with a winch.

In the above-mentioned deep foundation method, when ring-shaped concrete is divided into a plurality of pieces along the side wall of the deep foundation hole in the height direction and is placed, the mountain stoppers at the place of placement are removed. After doing the streak and attaching the formwork to its inner circumference,
Place concrete between the side wall of the deep foundation hole and the formwork.
When the concrete exhibits a predetermined strength, the formwork is removed, and the removed formwork is reused for the formwork at a place to be placed above it, if necessary.

[0004]

By the way, conventionally, when assembling a reinforcement or a mold along the side wall of the deep foundation hole or when removing the form, for example, a pipe material or the like is placed on the bottom of the deep foundation hole. The scaffolding assembled in was used. However, it is preferable to change the size of the scaffold at the time of arranging and at the time of constructing the form or removing the form, but in the case of a scaffold constructed of the above pipe material, it is very important to change the size. However, there is a drawback that it is not functional because it takes time to change the height.

On the other hand, a scaffold of the type that is used by suspending it by a frame assembled above the deep foundation hole is also used, but in the case of this type of scaffold, it is possible to prevent swinging in the front-back direction or the left-right direction. Difficult to work with. Also, when using scaffolds with different diameters during reinforcement and formwork construction, it is necessary to prepare two types of suspension scaffolds in advance to accommodate them, which not only increases costs but also increases workability. From the point of view, it became complicated and many points were left to be improved.

The present invention has been made in view of the above circumstances, and its object is to be able to freely move up and down, prevent swinging in the front-rear direction or the left-right direction, and change the diameter as necessary. The purpose is to provide a relocation scaffolding for deep foundations.

[0007]

In order to achieve the above object, in the invention according to claim 1, the elongating member is hung up and down by an elongating member extending downward from a frame assembled above the deep foundation hole. The scaffold is characterized in that a plurality of steady rest rods are radially and movably provided on the outer periphery of the scaffold main body.

According to a second aspect of the present invention, the steadying rod is provided with a sensor for detecting whether the rod is in a projecting state or a retracting state.

According to a third aspect of the invention, the scaffold body is provided with scaffold diameter adjusting means for changing the diameter of the scaffold body itself.

According to the fourth aspect of the present invention, in the scaffold diameter adjusting means, a plurality of rods provided circumferentially at intervals on the outer periphery of the scaffold body can be switched between the standing state and the tilted state. When the rods are tilted and switched to the horizontal state, the plate material is placed on the upper part of them.

The invention according to claim 5 is characterized in that a through hole for carrying out equipment is provided in a central portion of the scaffold body.

According to a sixth aspect of the present invention, the material carrying winch is provided on the gantry separately from the scaffold main body lifting means for suspending the scaffold main body.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of the deep scaffolding transfer scaffold. The deep scaffolding transfer scaffold 1 is suspended by a long member 3 such as a cable extending downward from a pedestal 2 assembled above the deep scave hole H. ing. The pedestal 2 is assembled in a gate shape, and by scooping or unwinding the long member 3 on the upper part, a scaffold body 11 to be described later is provided.
The winches 4 and 4 for moving up and down are provided. Also,
A winch 5 for carrying in materials is provided at approximately the center of the gantry 2 separately from the winches 4 and 4 for raising and lowering the scaffold body 11. A wire 6 extending from this material carrying winch 5
Passes through the intermediate sheave 7 and the top sheave 8 and one end thereof hangs in the deep foundation hole H. A hook, a small bucket, or the like is attached to one end of the wire 6 as needed.

The deep foundation transfer scaffold 1 comprises a scaffold main body 11 and a plurality of (four in this case) radial steady rods 12, ... Is a scaffold diameter adjusting means 1 whose diameter can be changed
3 is attached.

As shown in FIG. 4, the scaffold main body 11 is constructed by attaching a plate member 11b formed in a substantially circular shape to the upper surface of a frame 11a assembled in a lattice shape. A through hole 11c for carrying out equipment is formed at the center of the plate material 11b, and viewing windows 11d are provided at the front, rear, left and right of the plate material 11b.
This viewing window 11d is normally closed by a lid 11e.
Then, the steady rod 12 is attached to the plate member 11b so as to avoid the viewing window 11d.

As shown in FIG. 5, the steady rest rod 12 is supported by a tubular body 15 fixed to the plate member 11b so as to be movable in the axial direction thereof.
A groove 12a is formed in the side portion of the rod 2, and the rod 12 is fixed by engaging the tips of the bolts 16, 16 screwed into the side portion of the tubular body 15 with the groove 12a. Further, a sensor 17 such as a limit switch for detecting whether the rod 12 is in a protruding state or a retracted state is attached to the inner end side of the steadying rod 12.

As shown in FIG. 6, the scaffolding diameter adjusting means 13 has a plurality of (in this case, eight) rods 18, ... 1 and 4, the rods 18, ... Are tilted and engaged with stoppers (not shown) to be in a horizontal state, as shown in FIGS. 1 and 4. A ring-shaped plate member 19 is placed on and fixed to the upper part of them to be in a large diameter state. On the other hand, as shown in FIG. 7, the ring-shaped plate member 19 is removed and the rods 18, ... Are erected. Sometimes it becomes small diameter. Reference numeral 20 in FIG. 1 is a handrail, and reference numeral 21 in FIG. 4 is a reinforcing rib member that is passed between the tilted rods 18, ....

As shown in FIG. 1, the platform 2 and the scaffold body 11 are provided with operation panels 22 and 22 for rotating the winch 4 in forward and reverse directions. The operation panel 22 includes a forward rotation switch for operating the winch 4 in the forward direction, a reverse rotation switch for operating the winch 4 in the reverse direction, a stop switch, an emergency stop switch, and the like.
The winch can be operated either from above or from the scaffold main body 11. The sensor 17 is electrically connected to a control unit connected to the operation panel 22, and the sensor 17 interlocks so that the forward and reverse rotation operation of the winch 4 can be performed only when the rod 12 is in the retracted state. Are assembled.

Next, the operation of the deep scaffolding transfer scaffold having the above structure will be described. After excavating the deep foundation hole H until it reaches a predetermined depth to reach the supporting bedrock, ring-shaped concrete divided into a plurality of pieces in the height direction is sequentially placed on the inner circumference of the deep foundation hole H from the lower side. However, at this time, as shown in FIGS. 1 and 6, the rod 18 is tilted and the ring-shaped plate member 19 is placed on the upper side of the rod 18 to make the scaffold main body 11 in a large diameter state, and the operation panel 22 is operated in this state. The winches 4 and 4 are rotated in the forward and reverse directions to raise and lower the scaffolding main body 11 and position it at a predetermined height. FIG. 1 is a diagram showing an intermediate step of concrete pouring, in which the lower side of the scaffold body 11 shows the existing concrete C, and the upper side of the scaffold body 11 shows the portion where concrete is to be poured. In the figure, D indicates a form.

After fixing the scaffold main body 11 to the predetermined height position as described above, the worker existing in advance on the scaffold main body 11 loosens the bolts 16 and 16 screwed to the tubular body 15 respectively to prevent each steady rest. The rods 12, ... Are slid outwardly so that their tips come into contact with the side walls of the deep foundation hole H, and in this state, the bolts 16, 16 are tightened again. At this time,
Since the tip of each steadying rod 18 is supported in a state of abutting against the side wall of the deep foundation hole H, the scaffold main body 11 does not rock in the front-rear direction or the left-right direction. In this state, reinforcement work and formwork work are performed on the upper side of the existing concrete C that has already been placed.

The equipment used for bar arrangement and formwork construction is suspended from the ground on the scaffolding main body 11 by means of a material loading winch 5 provided separately from the winches 4 and 4 for raising and lowering the scaffolding main body 11. Lower it. On the contrary, unnecessary equipment is returned from the scaffold body 11 to the ground by the winch 5 for carrying in the same material.

Here, when proceeding with the formwork construction, the formwork removed from the place where the concrete has already been cast at the lower position and the curing has ended may be reused. In this case, as shown in FIG. 7, the scaffold main body 11 is previously set in a small diameter state so that the scaffold main body 11 does not interfere with the existing concrete C. That is, by removing the ring-shaped plate member 19 and the rib member 20 and setting the rods 18, ... In this state, the operation panel 22 is operated, the winches 4 and 4 are reversely rotated to lower the scaffold main body 11, and the rod 12 is slid outward again at a predetermined position to be fixed, and the form frame may be removed.

When the scaffold main body 11 is moved up and down, each sensor 17 detects that all the precession rods 12 have retracted, and the tip of the precession rods 12 are deeply pitted H. It is premised that it does not interfere with the inner peripheral surface of the winch 4, and as long as one of the sensors 17 is turned off, even if the forward or reverse switch of the operation panel 22 is operated, the winch 4, 4 does not rotate. Therefore, it is possible to prevent the situation in which the scaffold body 11 is lifted up and down while the steadying rod 12 extends outward and the scaffold body 11 is inadvertently tilted. As a result, the scaffold main body 11 can be used as a gondola (for man-made goods).

By repeating the above steps, ring-shaped concrete can be placed on the inner circumference of the deep foundation hole H from the bottom to the vicinity of the ground. If necessary, a reinforcing bar cage may be set in the central portion of the deep foundation hole, and the entire concrete may be poured.

The present invention is not limited to the above-mentioned embodiment, but the shapes of the scaffolding body 11 and the steady rest rods 12, the number of rods 18 and the like can be appropriately changed in practice. For example, in the above-mentioned embodiment, the rod slidably inserted in the tubular body 15 is the steady-state rod 12
However, the present invention is not limited to this, and a piston piston rod of a cylinder using air or hydraulic pressure may be used as a steady rod.

Further, the rods 18 constituting the scaffolding diameter adjusting means 13 can be switched to either an upright state or a tilted state, but the present invention is not limited to this, and the rods 18 are arranged in the horizontal direction and their axes are arranged. Along the scaffolding body 11
It may be provided slidably in the radial direction. Further, in the above-described embodiment, the ring-shaped plate member 19 is used to mount on the rod tilted horizontally, but the present invention is not limited to this, and the ring-shaped plate member is divided into a plurality of circles. An arc-shaped plate material may be used.

[0027]

According to the invention of claim 1, the plurality of steady rods provided on the outer peripheral portion of the scaffold body are advanced and retracted and fixed at positions where their tips abut the side walls of the deep foundation hole. By doing so, it is possible to prevent the scaffold body from swinging in the front-rear direction or in the left-right direction, and withdraw the anti-sway rod so that its tip is separated from the side wall of the deep foundation hole. The scaffold body can be raised and lowered freely by winding and unwinding the length member.

According to the second aspect of the present invention, the steady rod is provided with the sensor for detecting whether the rod is in the projecting state or the retracting state. Therefore, the electric signal from the sensor is used as the interlock signal. However, it is possible to control the scaffolding body so that it can be raised and lowered only when all the steady rods are in the retracted state, and in this way, the scaffolding body can be used as a gondola (for human cargo). it can.

According to the third aspect of the present invention, since the scaffold body is provided with scaffold diameter adjusting means capable of changing the diameter of the scaffold body itself, at the time of arranging and during construction of the form or removal of the form. Even if you want to change the size of the scaffolding body, you can easily deal with it.

According to the fourth aspect of the invention, the diameter of the scaffold body can be changed with a simple structure.

According to the invention of claim 5, since the through hole for carrying out the equipment is provided in the central portion of the scaffold main body, the scaffold main body is used to carry in the equipment from the ground to the bottom of the deep foundation hole. On the contrary, the work to carry out the equipment from the bottom of the deep foundation hole can be easily performed.

According to the sixth aspect of the invention, since the winch for carrying in the material is provided on the frame separately from the scaffolding body lifting means for suspending the scaffolding body, the material on the ground can be transferred onto the scaffolding body, On the contrary, it is extremely easy to transfer the material on the scaffold body to the ground.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the invention.

FIG. 2 is a plan view of the above embodiment.

FIG. 3 is a side view of the embodiment.

FIG. 4 is a sectional view taken along line XX of FIG. 1;

FIG. 5 is a side view of the steady rest rod.

FIG. 6 is a side view of a rod constituting a scaffold diameter adjusting means.

FIG. 7 is a side view illustrating the operation of the above embodiment.

[Explanation of symbols]

 1 Relocation scaffold for deep foundation 2 Frame 3 Long member 4 Winch 5 Winch for material loading 11 Scaffold main body 11c Through hole 12 Steady rod 13 Scaffold diameter adjusting means 15 Cylindrical body 16 Bolt 17 Sensor 18 Rod 22 Operation panel H Deep foundation Hole C Existing concrete

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Osamu Takano 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Issei Taguchi 3-1-1 Komondocho, Hakata-ku, Fukuoka-shi, Fukuoka Inside Guchi Industry Co., Ltd.

Claims (6)

[Claims] 1. A scaffold that is hung up and down freely by elevating means by a long member extending downward from a cradle assembled above a deep foundation hole, and a plurality of steady rods are provided on an outer peripheral portion of the scaffold body. The scaffolding for deep foundations is characterized by the fact that it is provided in a radial pattern and can be moved back and forth. 2. The deep foundation transfer scaffold according to claim 1, wherein the steady rod is provided with a sensor for detecting whether the rod is in a projecting state or a retracting state. Relocation scaffolding for foundation. 3. The deep foundation transfer scaffold according to claim 1 or 2, wherein the scaffold body is provided with scaffold diameter adjusting means for changing the diameter of the scaffold body itself. Relocation scaffolding. 4. The deep scaffolding transfer scaffold according to claim 3, wherein the scaffold diameter adjusting means includes a plurality of rods provided at an outer periphery of the scaffold body at intervals in a circumferential direction in an upright state and a tilted state, respectively. A deep scaffolding transfer scaffold characterized by being switchable to any of them, and when the rods are tilted and switched to a horizontal state, a plate material is placed on top of them. 5. The deep foundation transfer scaffold according to any one of claims 1 to 4, wherein a through hole for carrying out equipment is provided in a central portion of the scaffold body. Relocation scaffolding. 6. The deep foundation transfer scaffold according to any one of claims 1 to 5, wherein a material loading winch is provided on the platform separately from the scaffold body lifting means for suspending the scaffold body. A relocation scaffold for deep foundations that is characterized by that.